Microsoft Azure Data Fundamentals DP-900 Practice Question
A development team stores customer orders in a single table that repeats each customer's name and email in every row. They plan to move customer details to a separate Customers table and reference it from the Orders table with a foreign key. Which benefit of normalization does this change provide most directly?
It improves query plan caching by forcing parameterized statements.
It encrypts sensitive customer data at rest without additional configuration.
It reduces data redundancy and prevents update anomalies.
It enables eventual consistency across geographically distributed replicas.
Moving repeating customer attributes to a dedicated Customers table eliminates repeated values. This reduces data redundancy so the same customer information is stored only once. When a customer email changes, it is updated in one row, preventing inconsistent or conflicting copies (update anomalies). The other options describe security, availability, or performance features that are not direct goals of the described normalization step.
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Microsoft Azure Data Fundamentals DP-900
Identify considerations for relational data on Azure
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